<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表排序</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyWord" /> 
        <button @click="sortType = 2">年龄升序</button>
        <button @click="sortType = 1">年龄降序</button>
        <button @click="sortType = 0">原顺序</button>
        <ul>
            <li v-for="(p,index) in filterPersons">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>


    </div>
</body>
<script type="text/javascript">
   

    //基于计算属性实现 

    new Vue({
        el: '#root',
        data: {
            keyWord: '',
            persons: [
                { id: "001", "name": "马冬梅", "age": 32, 'sex': '女' },
                { id: "002", "name": "周冬梅", "age": 19, 'sex': '女' },
                { id: "003", "name": "周杰伦", "age": 20, 'sex': '男' },
                { id: "004", "name": "刘杰华", "age": 18, 'sex': '男' }
            ],
            sortType: 0, //0 原顺序 1 降序 2 升序
        },
        computed: {
            filterPersons(){

                const arr = this.persons.filter((p)=>{
                    return p.name.indexOf(this.keyWord) !==-1
                })
                //排序
                if(this.sortType){  //0==false
                 arr.sort((p1,p2)=>{
                    return this.sortType === 1 ? p2.age-p1.age : p1.age-p2.age
                 })
                }
                return arr;

            } 
        },
    })
</script>

</html>